Pre-Algebra
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The objective of pre-algebra is to prepare students for the study of algebra. Topics in pre-algebra include operations on real numbers; simplifying expressions; solving first-degree equations, inequalities and application problems; graphing linear equations; simplifying exponents; operations on polynomials; and factoring polynomials.
Thumbnail: Diagram of the Pythagorean theorem showing squaring a number is literally turning it into a square and that a squared (9) plus b squared (16) equals c squared (25) and that the square root is is the number before it was turned into a square therefore C = 5. (CC BY-SA 4.0; Gregg Tavares via Wikipedia).